Just purchased this wounderful program.

I am running two HD5850's (Sapphire Extreme Lite) and can successfully change the mem speed and core speed (Although the drivers fail as soon as I try to go over 880Mhz? (core)) but I don't seem to be able to increase the voltage to 1118 (I had a stable overclock using trixx at this voltage).

Any idea's as to why Trixx can change the voltage (Only on the one card!) but CoreClock can't?